Ryman devoted his entire career to monochrome white paintings that foreground materiality, surface and the physical presence of paint on canvas, sharing Charltons rigorous commitment to a single repeated format executed with austere consistency across decades.

Hafif produced sustained series of monochrome paintings that investigated a single colour or tone with methodical discipline, making her practice conceptually and visually aligned with Charltons grey circle works and their emphasis on quiet uniformity and seriality.

Graubner created large scale monochrome colour space paintings using layered acrylic and pigment that explore chromatic depth and spatial presence within a single tonal field, closely paralleling the meditative grey physicality and pure abstraction of Charltons circle panels.